Learn how to identify a male and female tree swallow. Find out about their nests, song, range map and what tree swallows eat.

From purple martins to barn swallows, find out how to spot and identify 8 members of the swallow bird family during summer.

As climate change worsens, spring temperatures come earlier in the year, cueing tree swallows to build their nests sooner. This leaves baby swallows vulnerable as the inevitable cold snap happens. “It ...